【摘要】 在得到的温度场分布的基础上,用有限元结构分析法数值模拟了金属圆管中脉冲激光线源产生的主应力场情况,得到了铝管中不同时刻的冯.密赛斯应力场,给出了不同时刻冯,密赛斯应力随周向和法向的分布以及等值图分布情况。数值结果表明:在激光加载中心点处冯.密赛斯应力值最大,冯.密赛斯应力随周向和法向的变化情况和温度场的变化类似。更多还原

【Abstract】 Based on the laser-induced temperature fields,the transient thermal stress fields generated by a pulsed line-source laser in aluminum pipe are analyzed by using a finite element method.The Von Mises stress fields are obtained at various time.The normal and the circumferential distributions of Von Mises stress are given at various time.And the isolines’ distributions of Von Mises stress are shown.The numerical results denoted: the center of the laser irradiation range at the material surface has the biggest Von Mises stress.The distribution of Von Mises stress is similar to the temperature distribution.更多还原